What was found
PNEMATIC DUCT PRESSURE LOW DURING ON THE LT ENGINE START. REPLACED THE APU SURGE VALVE IAW AMM 49-53-01-004-001, AND 49-53-01-404-010, REV 123. OPS CHECKED NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PNEMATIC DUCT PRESSURE LOW DURING ON THE LT ENGINE START. REPLACED THE APU SURGE VALVE IAW AMM 49-53-01-004-001, AND 49-53-01-404-010, REV 123. OPS CHECKED NORMAL.